MLA

Alexander, Jack, and Sabine Cassel. Sabine Cassel, Jean-Pierre Casse, Jack Alexander, and Michael Bennett on Ski Trip in Megeve, France. 0AD. https://collections.library.yale.edu/catalog/2027712.

APA, 6th edition

Alexander, J., & Cassel, S. (0 C.E.). Sabine Cassel, Jean-Pierre Casse, Jack Alexander, and Michael Bennett on ski trip in Megeve, France [Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2027712.